In guinea pigs coat color is determined by a single gene with two alleles. A guinea pig from a true-breeding black strain is mated with a guinea pig from a true-breeding white strain. The F1 progeny are all black. Two of the F1 progeny are mated with each other. What proportion of the black F2 progeny is expected to be homozygous?
a. 1/2
b. 1/3
c. 1/4
d. 3/4
Answer: b. 1/3
Biology & Microbiology
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Humans are an example of ____
a. bulk feeders b. deposit feeders c. fluid feeders d. suspension feeders e. bulk and fluid feeders
Biology & Microbiology
The R and S genes are linked and 10 map units apart. In the cross R s / r S × r s / r s what percentage of the progeny will be R s / r s?
A) 5% B) 10% C) 25% D) 40% E) 45%
Biology & Microbiology
DNA codes for the production of
a. proteins. b. minerals. c. inorganic molecules. d. vital gasses. e. water.
Biology & Microbiology
Ethanol can be easily produced from:a
photosynthetic pigments. b. crystalline cellulose. c. root systems of plants. d. plant sugars. e. all of these.
Biology & Microbiology